Pump-valve



UNITED STA-TES HERBERT E. HUNT, OF PITTSBURG, PENNSYLVANIA.

PU lVl P-VALVE.'

SPEIFICATION forming part of Letters Patent No. 546,591, datedy September 1'7, 1895. Application filed December 21, 1894. Serial No.' 532,515. (No model.)

T0 atl?, whom` z' may concern:

Be it known that I, HERBERT E. HUNT, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Pump-Valves, of which the'following is a full, clear, and exact description, reference being had. to the acf companying drawings, forming part of this specification, in which- Figure lis a top plan view of a pump provided with my improved valves; and Fig. 2 is a vertical section of the same, one of the valve-casings being broken away.

My invention relates to the inlet and outlet valves used in pumps, and is designed to simplify, cheapen, and improve their construction and provide a valve which may be used either for a suction or'a delivery valve.

In the drawingsin which similar numerals indicate like parts, 2 represents an air-pump, having the valve-chest 3. `This chest is divided longitudinally into two parts, one part containing the inlet-valves A and the other the delivery-valves 5. Each valve, as shown in Fig. 2, is provided with a valve-.casing 6, which is externally screw-threaded at its lower end and is screwed into the bridge 7v in the airchest. This casing is provided at its bottom end with inlet-holesS and with a shoulder 9, which ts down upon the bridge and is provided with different faces for the application of a wrench. A tapered seat 10 is formed in the interior of the casing, and at the upper end of this seat are the outlet-holes 1l. The valve is a simple round plug-valve, which is tapered at its lower part to tit the seat 10, and is provided ,with a guide-stem`1l2 extending down through the casing; LThe stem is sufficiently smaller in diameter than the hole to provide an annular opening of as great area as the area of the holes 8. Above each valve is an opening through which" the valve is inserted, these openings being closed by screwplugs 13, which limit the upward movement of the valve.

The advantages of my improved valve .will be apparent to those skilled in the art, since the valve casing and seat being in one piece .ent diameter joined by a beveled seat, and a valve having a body portionof substantially uniform diameter throughout and tting 'closely in the larger bore, said valve having a ytapered intermediate portion fitting on the' beveled seat and provided with' a guide-stem extending downwardly through the smaller bore, the casing having an annular chamber recessed therein around the guide-stem, and hol-es leading into said chamber, the stem being sufficiently smaller than the portion of the smaller bore above the recess to allow the air to pass upwardly around said stem, the said casing having radial holes above the guide-stem; substantially as described.

In testimony whereof I have hereunto set my hand.

HERBERT E; HUNT.

Witnesses:

H. M. CoRwIN, W.B. CORWIN. 

